https://bugs.kde.org/show_bug.cgi?id=376556

--- Comment #3 from yuli...@mailbox.org ---
(In reply to Mauro Carvalho Chehab from comment #2)
> Next time, please don't attach a zip file (or tarball). Instead, put
> each file inside it as a different attachment.
Ok.

> Ok, let's go by parts. The Realtek rtl2832 is a chip that always come with
> DVB-T internally, and supports only pure DVB-T. No DVB-T2 support. As the
> frontend is integrated with the demux on those devices, the Kernel
> recognizes it as frontend0.
> 
> Devices based on such chipset that supports other standards come with an
> extra chip for the frontend. In this case, Panasonic MN88473, with can do
> both DVB-T and DVB-T2.
> 
> As you're adding the same frequency table for both DVB-T and DVB-T2, I
> suspect that Kaffeine is using the first adapter (with supports only DVB-T)
> when seeking for channels. As far as I remember, I didn't add
> any special logic there that would make it so select the better adapter when
> scanning the file. So, it should just get the first available one.
> 
> You can easily test it by changing the adapter two for "no source" (or
> something different than "Automatischer Suchlauf").
> 
> With such change, when you ask to scan "Automatischer Suchlauf", it should
> use the second frontend (the Panasonic one).


When I set adapter 2 (RTL2832) DVB-T: No source
and adapter 1 (Panasonic MN88473) DVB-C: No source and DVB-T2: Automatischer
Suchlauf, then only DVB-T channels are found. Therewhile I can use 
$ dvb-fe-tool -a0 -f1 --get
and I see that the frequency changes and that it is always in DELIVERY_SYSTEM =
DVBT. But it uses the correct frontend (Panasonic MN88473) as far as I can see.

When I set adapter 2 (RTL2832) DVB-T: Automatischer Suchlauf
and adapter 1 (Panasonic MN88473) DVB-C: No source and DVB-T2: No source,  then
again only DVB-T channels are found. Therewhile I can use 
$ dvb-fe-tool -a0 -f0 --get
and I see that the frequency changes and that it is always in DELIVERY_SYSTEM =
DVBT. But this one of course can only do DVB-T only, as it is the wrong
frontend (RTL2832).

So I think that kaffeine uses the correctly the Panasonic MN88473, but fails to
search for DVB-T2 channels. 

May there be some information missing in the frequency table for scanning? Is
the frequency table used actually, if I say "Automatischer Suchlauf"?


> If this works, I'll take a look at the code and seek for a solution to do it
> automatically, but you'll likely need to test such patch, as I guess I don't
> have any RTL-based device with an extra DVB-T2 frontend.
I'd like to test patches.

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